Unit2Newsmedia-TheFirstPeriodI.BriefStatementsBasedontheUnitTheactivitiesofthisunit,includingWarming-up,Listening,Speaking,ReadingandWriting,centeronthesubject－newsandthemedia,whichareconnectedwithourlifeclosely.Itprovidesthestudentsanopportunitytolearnthelanguageinusingit.Bytalkingaboutnewsandthemedia,thestudentsgetmoreknowledgeaboutthem－notonlyknowabouttheimportantpartstheyplayinlearningabouttheworld,butalsothewaystheyarewrittenandmade.Thestudentsmustbeveryinterestedinthissubject.Thisway,theycanlearnthelanguagepointseasilyandfreely.Theywillnotonlylearnsomeusefulwordsandphrasesaboutnewsandthemedia,butalsolearntoexpressopinions.Besides,thestudyoftheGrammar－thePastParticiplecanhelpthestudentsusethelanguagemoreexactly.Byfinishingeachtaskprovidedinthetextbookandtheworkbook,thestudents'skillstouselanguagecanbewelldeveloped..TeachingGoalsⅡ1.Talkaboutnewsandthemedia.2.Practiseexpressingopinions.3.LearnaboutthePastParticiple(1):usedasAttributeandPredicative.4.Writeacomparisonparagraph..TeachingTime:FourperiodsⅢIV.BackgroundInformation1.RADIOInancienttimestheonlywaythatmencouldsendmessagesfromvillagetovillagewasonfoot.Whenmenlearnedtousethehorse,communicationbecamemuchquicker.However,comparedtothemodernworldcommunicationwasstillquiteslow.Manypartsoftheworldhadnoknowledgeofeventsinotherplaces.Later,thepostwasintroducedandhorseriderscarriedletters.Thismeantthatcommunicationwasfurtherimproved.Horsesdrawncoachescouldmovepeoplefromtowntotowninquiteacomfortableway.Atthebeginningofthelastcenturythesteamtrainwasinventedandforthefirsttimereallyfastcommunicationbecamepossible.Notonlycouldlettersbesenteasilyfromonepartofacountrytoanother,buttravelwasmadeeasy,too.Ataboutthesametime,steamshipshelpedcommunicationbetweencountries.Theinventionofthetelegraphinthemiddleofthelastcenturyfurtherincreasedthespeedatwhichmessagescouldbesent.Inthissystemelectricalsignals,incode,aresentalongmetalwires.Thesesignalstravelsofastthattheycouldgonearlyeighttimesroundtheworldinonesecond.Aspecialdeviceisneededtosendthecode.Attheotherendanotherdeviceisusedinordertoreceivethecode.Bythismethodmessagescanbesentoverdistancesofseveralhundredkilometres.Withtheinventionofthetelephonethehumanvoicecouldbesentoverlongdistances.Becauseofthisthetelephonesystemreplacedthetelegraphforquickcommunicationoverlongdistances.Thetelegraphisstillused,however,bynewspapersinordertosendnewsandforotherpurposestoo.Atthebeginningofthiscenturyradiowasinventedandinafewyearscommunicationwasagainimproved.Themaindifferencebetweenradioandtelephoneisthatradiousesnoelectricalsignalswhichtravellongdistancesalongwires.Insteadinvisiblewaves,用心爱心专心115号编辑movingatthesamespeedaselectricalsignals,areused.Afewyearsagotherewerenotmanyradiostationsintheworld.Todaytherearemanyhundredsofradiostationsbroadcastingindifferentlanguagesandinallcountries.Theinvisibleradiowavescaneasilytravelfromonecountrytoanother.Thismeansthatlistenersinonecountrycanlistentoprogrammesbroadcastfromanothercountry.Inthiswayinformationtravelsfromcountrytocountry.Radioisoftenusedbypolicementocommunicatewithoneanother.Inaddition,policeforcesinonecountrycancommunicatewiththoseinothercountriesinordertocatchcriminals.Shipsatseauseradiosothattheyknowexactlywheretheyare.Aeroplanesuseradioforthesamereasonandthismakesiteasierforthemtofindtheirwayfromplacetoplace.Inthemodernworldth...
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